Comey has mostly stayed out of the public eye since President Donald Trump fired him in May amid an investigation into the Trump campaign’s ties to Russia. He emerged to testify before Congress about the investigation, but has otherwise kept a low profile.

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But the former FBI director has sent other tweets from this account, which now uses the handle @FormerBu and the name “Reinhold Niebuhr.” In March, Gizmodo reported that Comey was using Twitter under the handle @projectexile7.

His recent tweets include photos of West Point, Gettysburg and Iowa, where he wrote that he was thinking about “Niebuhr’s Serenity Prayer,” which asks God to grant serenity for things one cannot change.

Comey is also writing a book about leadership and “yet-unheard anecdotes” from his career, set to come out in the spring of 2018.